+++ /dev/null
-/*
- * mac80211 glue code for mac80211 ST-Ericsson CW1200 drivers
- * ITP code
- *
- * Copyright (c) 2010, ST-Ericsson
- * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/debugfs.h>
-#include <linux/poll.h>
-#include <linux/time.h>
-#include <linux/random.h>
-#include <linux/kallsyms.h>
-#include <net/mac80211.h>
-#include "cw1200.h"
-#include "debug.h"
-#include "itp.h"
-#include "sta.h"
-
-static int __cw1200_itp_open(struct cw1200_common *priv);
-static int __cw1200_itp_close(struct cw1200_common *priv);
-static void cw1200_itp_rx_start(struct cw1200_common *priv);
-static void cw1200_itp_rx_stop(struct cw1200_common *priv);
-static void cw1200_itp_rx_stats(struct cw1200_common *priv);
-static void cw1200_itp_rx_reset(struct cw1200_common *priv);
-static void cw1200_itp_tx_stop(struct cw1200_common *priv);
-static void cw1200_itp_handle(struct cw1200_common *priv,
- struct sk_buff *skb);
-static void cw1200_itp_err(struct cw1200_common *priv,
- int err,
- int arg);
-static void __cw1200_itp_tx_stop(struct cw1200_common *priv);
-
-static ssize_t cw1200_itp_read(struct file *file,
- char __user *user_buf, size_t count, loff_t *ppos)
-{
- struct cw1200_common *priv = file->private_data;
- struct cw1200_itp *itp = &priv->debug->itp;
- struct sk_buff *skb;
- int ret;
-
- if (skb_queue_empty(&itp->log_queue))
- return 0;
-
- skb = skb_dequeue(&itp->log_queue);
- ret = copy_to_user(user_buf, skb->data, skb->len);
- *ppos += skb->len;
- skb->data[skb->len] = 0;
- pr_debug("[ITP] >>> %s", skb->data);
- consume_skb(skb);
-
- return skb->len - ret;
-}
-
-static ssize_t cw1200_itp_write(struct file *file,
- const char __user *user_buf, size_t count, loff_t *ppos)
-{
- struct cw1200_common *priv = file->private_data;
- struct sk_buff *skb;
-
- if (!count || count > 1024)
- return -EINVAL;
- skb = dev_alloc_skb(count + 1);
- if (!skb)
- return -ENOMEM;
- skb_trim(skb, 0);
- skb_put(skb, count + 1);
- if (copy_from_user(skb->data, user_buf, count)) {
- kfree_skb(skb);
- return -EFAULT;
- }
- skb->data[count] = 0;
-
- cw1200_itp_handle(priv, skb);
- consume_skb(skb);
- return count;
-}
-
-static unsigned int cw1200_itp_poll(struct file *file, poll_table *wait)
-{
- struct cw1200_common *priv = file->private_data;
- struct cw1200_itp *itp = &priv->debug->itp;
- unsigned int mask = 0;
-
- poll_wait(file, &itp->read_wait, wait);
-
- if (!skb_queue_empty(&itp->log_queue))
- mask |= POLLIN | POLLRDNORM;
-
- mask |= POLLOUT | POLLWRNORM;
-
- return mask;
-}
-
-static int cw1200_itp_open(struct inode *inode, struct file *file)
-{
- struct cw1200_common *priv = inode->i_private;
- struct cw1200_itp *itp = &priv->debug->itp;
- int ret = 0;
-
- file->private_data = priv;
- if (atomic_inc_return(&itp->open_count) == 1) {
- ret = __cw1200_itp_open(priv);
- if (ret && !atomic_dec_return(&itp->open_count))
- __cw1200_itp_close(priv);
- } else {
- atomic_dec(&itp->open_count);
- ret = -EBUSY;
- }
-
- return ret;
-}
-
-static int cw1200_itp_close(struct inode *inode, struct file *file)
-{
- struct cw1200_common *priv = file->private_data;
- struct cw1200_itp *itp = &priv->debug->itp;
- if (!atomic_dec_return(&itp->open_count)) {
- __cw1200_itp_close(priv);
- wake_up(&itp->close_wait);
- }
- return 0;
-}
-
-static const struct file_operations fops_itp = {
- .open = cw1200_itp_open,
- .read = cw1200_itp_read,
- .write = cw1200_itp_write,
- .poll = cw1200_itp_poll,
- .release = cw1200_itp_close,
- .llseek = default_llseek,
- .owner = THIS_MODULE,
-};
-
-static void cw1200_itp_fill_pattern(u8 *data, int size,
- enum cw1200_itp_data_modes mode)
-{
- if (size <= 0)
- return;
-
- switch (mode) {
- default:
- case ITP_DATA_ZEROS:
- memset(data, 0x0, size);
- break;
- case ITP_DATA_ONES:
- memset(data, 0xff, size);
- break;
- case ITP_DATA_ZERONES:
- memset(data, 0x55, size);
- break;
- case ITP_DATA_RANDOM:
- get_random_bytes(data, size);
- break;
- }
- return;
-}
-
-static void cw1200_itp_tx_work(struct work_struct *work)
-{
- struct cw1200_itp *itp = container_of(work, struct cw1200_itp,
- tx_work.work);
- struct cw1200_common *priv = itp->priv;
- atomic_set(&priv->bh_tx, 1);
- wake_up(&priv->bh_wq);
-}
-
-static void cw1200_itp_tx_finish(struct work_struct *work)
-{
- struct cw1200_itp *itp = container_of(work, struct cw1200_itp,
- tx_finish.work);
- __cw1200_itp_tx_stop(itp->priv);
-}
-
-int cw1200_itp_init(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
-
- itp->priv = priv;
- atomic_set(&itp->open_count, 0);
- atomic_set(&itp->stop_tx, 0);
- atomic_set(&itp->awaiting_confirm, 0);
- skb_queue_head_init(&itp->log_queue);
- spin_lock_init(&itp->tx_lock);
- init_waitqueue_head(&itp->read_wait);
- init_waitqueue_head(&itp->write_wait);
- init_waitqueue_head(&itp->close_wait);
- INIT_DELAYED_WORK(&itp->tx_work, cw1200_itp_tx_work);
- INIT_DELAYED_WORK(&itp->tx_finish, cw1200_itp_tx_finish);
- itp->data = NULL;
- itp->hdr_len = WSM_TX_EXTRA_HEADROOM +
- sizeof(struct ieee80211_hdr_3addr);
-
- if (!debugfs_create_file("itp", S_IRUSR | S_IWUSR,
- priv->debug->debugfs_phy, priv, &fops_itp))
- return -ENOMEM;
-
- return 0;
-}
-
-void cw1200_itp_release(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
-
- wait_event_interruptible(itp->close_wait,
- !atomic_read(&itp->open_count));
-
- WARN_ON(atomic_read(&itp->open_count));
-
- skb_queue_purge(&itp->log_queue);
- cw1200_itp_tx_stop(priv);
-}
-
-static int __cw1200_itp_open(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
-
- if (!priv->vif)
- return -EINVAL;
- if (priv->join_status)
- return -EINVAL;
- itp->saved_channel = priv->channel;
- if (!priv->channel)
- priv->channel = &priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels[0];
- wsm_set_bssid_filtering(priv, false);
- cw1200_itp_rx_reset(priv);
- return 0;
-}
-
-static int __cw1200_itp_close(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- if (atomic_read(&itp->test_mode) == TEST_MODE_RX_TEST)
- cw1200_itp_rx_stop(priv);
- cw1200_itp_tx_stop(priv);
- cw1200_disable_listening(priv);
- cw1200_update_filtering(priv);
- priv->channel = itp->saved_channel;
- return 0;
-}
-
-bool cw1200_is_itp(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- return atomic_read(&itp->open_count) != 0;
-}
-
-static void cw1200_itp_rx_reset(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- itp->rx_cnt = 0;
- itp->rx_rssi = 0;
- itp->rx_rssi_max = -1000;
- itp->rx_rssi_min = 1000;
-}
-
-static void cw1200_itp_rx_start(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
-
- pr_debug("[ITP] RX start, band = %d, ch = %d\n",
- itp->band, itp->ch);
- atomic_set(&itp->test_mode, TEST_MODE_RX_TEST);
- cw1200_update_listening(priv, false);
- priv->channel = &priv->hw->
- wiphy->bands[itp->band]->channels[itp->ch];
- cw1200_update_listening(priv, true);
- wsm_set_bssid_filtering(priv, false);
-}
-
-static void cw1200_itp_rx_stop(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- pr_debug("[ITP] RX stop\n");
- atomic_set(&itp->test_mode, TEST_MODE_NO_TEST);
- cw1200_itp_rx_reset(priv);
-}
-
-static void cw1200_itp_rx_stats(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- struct sk_buff *skb;
- char buf[128];
- int len, ret;
- struct wsm_mib_counters_table counters;
-
- ret = wsm_get_counters_table(priv, &counters);
-
- if (ret)
- cw1200_itp_err(priv, -EBUSY, 20);
-
- if (!itp->rx_cnt)
- len = snprintf(buf, sizeof(buf), "1,0,0,0,0,%d\n",
- counters.rx_packet_errors);
- else
- len = snprintf(buf, sizeof(buf), "1,%d,%ld,%d,%d,%d\n",
- itp->rx_cnt,
- itp->rx_cnt ? itp->rx_rssi / itp->rx_cnt : 0,
- itp->rx_rssi_min, itp->rx_rssi_max,
- counters.rx_packet_errors);
-
- if (len <= 0) {
- cw1200_itp_err(priv, -EBUSY, 21);
- return;
- }
-
- skb = dev_alloc_skb(len);
- if (!skb) {
- cw1200_itp_err(priv, -ENOMEM, 22);
- return;
- }
-
- itp->rx_cnt = 0;
- itp->rx_rssi = 0;
- itp->rx_rssi_max = -1000;
- itp->rx_rssi_min = 1000;
-
- skb_trim(skb, 0);
- skb_put(skb, len);
-
- memcpy(skb->data, buf, len);
- skb_queue_tail(&itp->log_queue, skb);
- wake_up(&itp->read_wait);
-}
-
-static void cw1200_itp_tx_start(struct cw1200_common *priv)
-{
- struct wsm_tx *tx;
- struct ieee80211_hdr_3addr *hdr;
- struct cw1200_itp *itp = &priv->debug->itp;
- struct wsm_mib_association_mode assoc_mode = {
- .flags = WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE,
- .preamble = itp->preamble,
- };
- int len;
- u8 da_addr[6] = ITP_DEFAULT_DA_ADDR;
-
- /* Rates index 4 and 5 are not supported */
- if (itp->rate > 3)
- itp->rate += 2;
-
- pr_debug("[ITP] TX start: band = %d, ch = %d, rate = %d, preamble = %d, number = %d, data_mode = %d, interval = %d, power = %d, data_len = %d\n",
- itp->band, itp->ch, itp->rate, itp->preamble,
- itp->number, itp->data_mode, itp->interval_us,
- itp->power, itp->data_len);
-
- len = itp->hdr_len + itp->data_len;
-
- itp->data = kmalloc(len, GFP_KERNEL);
- tx = (struct wsm_tx *)itp->data;
- tx->hdr.len = itp->data_len + itp->hdr_len;
- tx->hdr.id = __cpu_to_le16(0x0004 | 1 << 6);
- tx->max_tx_rate = itp->rate;
- tx->queue_id = 3;
- tx->more = 0;
- tx->flags = 0xc;
- tx->packet_id = 0x55ff55;
- tx->reserved = 0;
- tx->expire_time = 1;
-
- if (itp->preamble == ITP_PREAMBLE_GREENFIELD)
- tx->ht_tx_parameters = WSM_HT_TX_GREENFIELD;
- else if (itp->preamble == ITP_PREAMBLE_MIXED)
- tx->ht_tx_parameters = WSM_HT_TX_MIXED;
-
- hdr = (struct ieee80211_hdr_3addr *)&itp->data[sizeof(struct wsm_tx)];
- memset(hdr, 0, sizeof(*hdr));
- hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_FCTL_TODS);
- memcpy(hdr->addr1, da_addr, ETH_ALEN);
- memcpy(hdr->addr2, priv->vif->addr, ETH_ALEN);
- memcpy(hdr->addr3, da_addr, ETH_ALEN);
-
- cw1200_itp_fill_pattern(&itp->data[itp->hdr_len],
- itp->data_len, itp->data_mode);
-
- cw1200_update_listening(priv, false);
- priv->channel = &priv->hw->wiphy->bands[itp->band]->channels[itp->ch];
- WARN_ON(wsm_set_output_power(priv, itp->power));
- if (itp->preamble == ITP_PREAMBLE_SHORT ||
- itp->preamble == ITP_PREAMBLE_LONG)
- WARN_ON(wsm_set_association_mode(priv,
- &assoc_mode));
- wsm_set_bssid_filtering(priv, false);
- cw1200_update_listening(priv, true);
-
- spin_lock_bh(&itp->tx_lock);
- atomic_set(&itp->test_mode, TEST_MODE_TX_TEST);
- atomic_set(&itp->awaiting_confirm, 0);
- atomic_set(&itp->stop_tx, 0);
- atomic_set(&priv->bh_tx, 1);
- ktime_get_ts(&itp->last_sent);
- wake_up(&priv->bh_wq);
- spin_unlock_bh(&itp->tx_lock);
-}
-
-void __cw1200_itp_tx_stop(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- spin_lock_bh(&itp->tx_lock);
- kfree(itp->data);
- itp->data = NULL;
- atomic_set(&itp->test_mode, TEST_MODE_NO_TEST);
- spin_unlock_bh(&itp->tx_lock);
-}
-
-static void cw1200_itp_tx_stop(struct cw1200_common *priv)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- pr_debug("[ITP] TX stop\n");
- atomic_set(&itp->stop_tx, 1);
- flush_workqueue(priv->workqueue);
-
- /* time for FW to confirm all tx requests */
- msleep(500);
-
- __cw1200_itp_tx_stop(priv);
-}
-
-static int cw1200_print_fw_version(struct cw1200_common *priv,
- u8 *buf, size_t len)
-{
- return snprintf(buf, len, "%s %d.%d",
- cw1200_fw_types[priv->wsm_caps.fw_type],
- priv->wsm_caps.fw_ver,
- priv->wsm_caps.fw_build);
-}
-
-static void cw1200_itp_get_version(struct cw1200_common *priv,
- enum cw1200_itp_version_type type)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- struct sk_buff *skb;
- char buf[ITP_BUF_SIZE];
- size_t size = 0;
- int len;
- pr_debug("[ITP] print %s version\n",
- type == ITP_CHIP_ID ? "chip" : "firmware");
-
- len = snprintf(buf, ITP_BUF_SIZE, "2,");
- if (len <= 0) {
- cw1200_itp_err(priv, -EINVAL, 40);
- return;
- }
- size += len;
-
- switch (type) {
- case ITP_CHIP_ID:
- len = cw1200_print_fw_version(priv, buf+size,
- ITP_BUF_SIZE - size);
-
- if (len <= 0) {
- cw1200_itp_err(priv, -EINVAL, 41);
- return;
- }
- size += len;
- break;
- case ITP_FW_VER:
- len = snprintf(buf+size, ITP_BUF_SIZE - size,
- "%d.%d", priv->wsm_caps.hw_id,
- priv->wsm_caps.hw_subid);
- if (len <= 0) {
- cw1200_itp_err(priv, -EINVAL, 42);
- return;
- }
- size += len;
- break;
- default:
- cw1200_itp_err(priv, -EINVAL, 43);
- break;
- }
-
- len = snprintf(buf+size, ITP_BUF_SIZE-size, "\n");
- if (len <= 0) {
- cw1200_itp_err(priv, -EINVAL, 44);
- return;
- }
- size += len;
-
- skb = dev_alloc_skb(size);
- if (!skb) {
- cw1200_itp_err(priv, -ENOMEM, 45);
- return;
- }
-
- skb_trim(skb, 0);
- skb_put(skb, size);
-
- memcpy(skb->data, buf, size);
- skb_queue_tail(&itp->log_queue, skb);
- wake_up(&itp->read_wait);
-}
-
-int cw1200_itp_get_tx(struct cw1200_common *priv, u8 **data,
- size_t *tx_len, int *burst)
-{
- struct cw1200_itp *itp;
- struct timespec now;
- int time_left_us;
-
- if (!priv->debug)
- return 0;
-
- itp = &priv->debug->itp;
-
- if (!itp)
- return 0;
-
- spin_lock_bh(&itp->tx_lock);
- if (atomic_read(&itp->test_mode) != TEST_MODE_TX_TEST)
- goto out;
-
- if (atomic_read(&itp->stop_tx))
- goto out;
-
- if (itp->number == 0) {
- atomic_set(&itp->stop_tx, 1);
- queue_delayed_work(priv->workqueue, &itp->tx_finish, HZ/10);
- goto out;
- }
-
- if (!itp->data)
- goto out;
-
- if (priv->hw_bufs_used >= 2) {
- if (!atomic_read(&priv->bh_rx))
- atomic_set(&priv->bh_rx, 1);
- atomic_set(&priv->bh_tx, 1);
- goto out;
- }
-
- ktime_get_ts(&now);
- time_left_us = (itp->last_sent.tv_sec - now.tv_sec)*1000000 +
- (itp->last_sent.tv_nsec - now.tv_nsec)/1000 +
- itp->interval_us;
-
- if (time_left_us > ITP_TIME_THRES_US) {
- queue_delayed_work(priv->workqueue, &itp->tx_work,
- ITP_US_TO_MS(time_left_us)*HZ/1000);
- goto out;
- }
-
- if (time_left_us > 50)
- udelay(time_left_us);
-
- if (itp->number > 0)
- itp->number--;
-
- *data = itp->data;
- *tx_len = itp->data_len + itp->hdr_len;
-
- if (itp->data_mode == ITP_DATA_RANDOM)
- cw1200_itp_fill_pattern(&itp->data[itp->hdr_len],
- itp->data_len, itp->data_mode);
- *burst = 2;
- atomic_set(&priv->bh_tx, 1);
- ktime_get_ts(&itp->last_sent);
- atomic_add(1, &itp->awaiting_confirm);
- spin_unlock_bh(&itp->tx_lock);
- return 1;
-
-out:
- spin_unlock_bh(&itp->tx_lock);
- return 0;
-}
-
-bool cw1200_itp_rxed(struct cw1200_common *priv, struct sk_buff *skb)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- struct ieee80211_rx_status *rx = IEEE80211_SKB_RXCB(skb);
- int signal;
-
- if (atomic_read(&itp->test_mode) != TEST_MODE_RX_TEST)
- return cw1200_is_itp(priv);
- if (rx->freq != priv->channel->center_freq)
- return true;
-
- signal = rx->signal;
- itp->rx_cnt++;
- itp->rx_rssi += signal;
- if (itp->rx_rssi_min > rx->signal)
- itp->rx_rssi_min = rx->signal;
- if (itp->rx_rssi_max < rx->signal)
- itp->rx_rssi_max = rx->signal;
-
- return true;
-}
-
-void cw1200_itp_wake_up_tx(struct cw1200_common *priv)
-{
- wake_up(&priv->debug->itp.write_wait);
-}
-
-bool cw1200_itp_tx_running(struct cw1200_common *priv)
-{
- if (atomic_read(&priv->debug->itp.awaiting_confirm) ||
- atomic_read(&priv->debug->itp.test_mode) ==
- TEST_MODE_TX_TEST) {
- atomic_sub(1, &priv->debug->itp.awaiting_confirm);
- return true;
- }
- return false;
-}
-
-static void cw1200_itp_handle(struct cw1200_common *priv,
- struct sk_buff *skb)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- const struct wiphy *wiphy = priv->hw->wiphy;
- int cmd;
- int ret;
-
- pr_debug("[ITP] <<< %s", skb->data);
- if (sscanf(skb->data, "%d", &cmd) != 1) {
- cw1200_itp_err(priv, -EINVAL, 1);
- return;
- }
-
- switch (cmd) {
- case 1: /* RX test */
- if (atomic_read(&itp->test_mode)) {
- cw1200_itp_err(priv, -EBUSY, 0);
- return;
- }
- ret = sscanf(skb->data, "%d,%d,%d",
- &cmd, &itp->band, &itp->ch);
- if (ret != 3) {
- cw1200_itp_err(priv, -EINVAL, ret + 1);
- return;
- }
- if (itp->band >= 2) {
- cw1200_itp_err(priv, -EINVAL, 2);
- } else if (!wiphy->bands[itp->band]) {
- cw1200_itp_err(priv, -EINVAL, 2);
- } else if (itp->ch >= wiphy->bands[itp->band]->n_channels) {
- cw1200_itp_err(priv, -EINVAL, 3);
- } else {
- cw1200_itp_rx_stats(priv);
- cw1200_itp_rx_start(priv);
- }
- break;
- case 2: /* RX stat */
- cw1200_itp_rx_stats(priv);
- break;
- case 3: /* RX/TX stop */
- if (atomic_read(&itp->test_mode) == TEST_MODE_RX_TEST) {
- cw1200_itp_rx_stats(priv);
- cw1200_itp_rx_stop(priv);
- } else if (atomic_read(&itp->test_mode) == TEST_MODE_TX_TEST) {
- cw1200_itp_tx_stop(priv);
- } else {
- cw1200_itp_err(priv, -EBUSY, 0);
- }
- break;
- case 4: /* TX start */
- if (atomic_read(&itp->test_mode) != TEST_MODE_NO_TEST) {
- cw1200_itp_err(priv, -EBUSY, 0);
- return;
- }
- ret = sscanf(skb->data, "%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
- &cmd, &itp->band, &itp->ch, &itp->rate,
- &itp->preamble, &itp->number, &itp->data_mode,
- &itp->interval_us, &itp->power, &itp->data_len);
- if (ret != 10) {
- cw1200_itp_err(priv, -EINVAL, ret + 1);
- return;
- }
- if (itp->band >= 2) {
- cw1200_itp_err(priv, -EINVAL, 2);
- } else if (!wiphy->bands[itp->band]) {
- cw1200_itp_err(priv, -EINVAL, 2);
- } else if (itp->ch >= wiphy->bands[itp->band]->n_channels) {
- cw1200_itp_err(priv, -EINVAL, 3);
- } else if (itp->rate >= 20) {
- cw1200_itp_err(priv, -EINVAL, 4);
- } else if (itp->preamble >= ITP_PREAMBLE_MAX) {
- cw1200_itp_err(priv, -EINVAL, 5);
- } else if (itp->data_mode >= ITP_DATA_MAX_MODE) {
- cw1200_itp_err(priv, -EINVAL, 7);
- } else if (itp->data_len < ITP_MIN_DATA_SIZE ||
- itp->data_len > (priv->wsm_caps.input_buffer_size - itp->hdr_len)) {
- cw1200_itp_err(priv, -EINVAL, 8);
- } else {
- cw1200_itp_tx_start(priv);
- }
- break;
- case 5:
- cw1200_itp_get_version(priv, ITP_CHIP_ID);
- break;
- case 6:
- cw1200_itp_get_version(priv, ITP_FW_VER);
- break;
- }
-}
-
-static void cw1200_itp_err(struct cw1200_common *priv,
- int err, int arg)
-{
- struct cw1200_itp *itp = &priv->debug->itp;
- struct sk_buff *skb;
- static char buf[255];
- int len;
-
- len = snprintf(buf, sizeof(buf), "%d,%d\n",
- err, arg);
- if (len <= 0)
- return;
-
- skb = dev_alloc_skb(len);
- if (!skb)
- return;
-
- skb_trim(skb, 0);
- skb_put(skb, len);
-
- memcpy(skb->data, buf, len);
- skb_queue_tail(&itp->log_queue, skb);
- wake_up(&itp->read_wait);
-
- len = sprint_symbol(buf,
- (unsigned long)__builtin_return_address(0));
- if (len <= 0)
- return;
- pr_debug("[ITP] error %d,%d from %s\n",
- err, arg, buf);
-}
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff